Log in and return to world = double queue Could be just one.

Visiting another world server? Can't return due to congestion before you have to log off..

Log on next day, and just before you enter the world, you see a message saying you've been visiting, and to use a starting city aetherite to return.

Unfortunately, if it's still congested, you now have to wait for the login queue to the server you're vising, and ALSO wait for the transfer queue as well.
The game should at least ask you if you want to return when the initial visiting message appears, and perform the switch BEFORE you wait to get on, eliminating one queue wait.

Havent tried it myself but on the login screen with your characters you can (dunno if its possible now due to lockouts) right click and in the drop down menu world visit from there.